[ pol-ee-kris-tl-in, -ahyn, -een ]
/ ˌpɒl iˈkrɪs tl ɪn, -ˌaɪn, -ˌin /


(of a rock or metal) composed of aggregates of individual crystals.
having or consisting of crystals that are variously oriented.


Discover The Influence Of Portuguese On English Via This Quiz!
We’ve gathered some interesting words donated to English from Portuguese … as well as some that just don’t translate at all. Do you know what they mean?
Question 1 of 11
Which of the following bird names traces its immediate origin to Portuguese?

Origin of polycrystalline

First recorded in 1920–25; poly- + crystalline
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020